I am currently running shock tests through simulation on an assembly. The shock tests I will be done at -45C, 20C, and 85C. I need material properties for the components in the assembly for each of these temps. I was instructed to go to the manufacturer but I'm not sure if they would have that specific data. I also tried to run a separate simulation on a single component from the assembly at one of the temps to see if it would generate material property data based on that temp. Any thoughts?

You'll need to go to the material vendor or run your own physical tests to determine material properties at a given temperature. SolidWorks won't make any material data up, aside from interpolating between values you put in to a temperature-dependent material (for instance, I have most of our data at 75, 200, 300, 400 and 500F, yet most of our parts are run at 330F or 450F, so the software figures those values out).